Jamaican sprinter Usain Bolt returns to Olympic competition Tuesday at the 2012 London Games in the first round of the 200-meters event.

Bolt enters Olympic Stadium one day after receiving his gold medal for winning Sunday's 100-meters race, winning the unofficial title of “Fastest Man in the World”. He is expected to once again beat Yohan Blake, his teammate, training partner and chief rival. Blake won the silver medal in Sunday's 100 meters race.

The 200-meters final is set for Thursday night.

Also in track and field, China's Liu Xiang is aiming to defeat defending champion Dayron Robles of Cuba in the 110-meter hurdles and redeem his heartbreaking withdrawal from the 2008 Beijing Olympics because of injury.

Australian Sally Pearson is picked to win the women's 100-meters hurdles gold against Americans Dawn Harper, the defending Olympic champion, and Lolo Jones.

Back in the men's draw, Kenya's Asbel Kiprop is hoping to repeat his gold medal performance from Beijing in Tuesday's final of the 1,500-meters. His challengers include Algeria's Taoufik Makhloufi, who was expelled by track and field's governing body for failing to race hard enough in his 800-meters heat. The decision was eventually revoked after it determined Makhloufi had a knee injury.

In track cycling at the Velodrome, the host country is hoping for two more gold medals as Chris Hoy races in the men's keirin for his sixth career gold medal, while Victoria Pendleton battles Germany's Kristina Vogel in the semi-finals in the women's individual sprint and a chance for a possible matchup against Australia's Anna Meares, who will face China's Guo Shauang in the semi-finals.

China leads the overall medal count for the 2012 London Olympics with 64, including 31 gold. A close second is the United States with 63 medals including 29 gold. Russia has overtaken Britain for third in the medal race, with 42 including seven gold.